Question

Put a checkmark next to any of the five following statements that are true.

For the process of two liquids mixing, (delta)S(solution) is always positive while (delta)H(solution) can either be positive or negative.

The nitrite ion, NO2-, has two resonance structures.

The molecule ClBr3 is non-polar.

In general smaller atoms have lower electronegativity values.

The molecule CO2 is best thought of as exhibiting resonance.

In an isoelectronic series, the most positively charged ion has the smallest radius.

Answer 1

When 2 liquids are mixed Change in entropy is given by following formula

as Xi in logariothm give negative value so change in entropy is always positive.

Also Enthalpy of solution can be eiher mositive or negative based on liquids being mixed

NO2- have 2 major resonance structures which are aas follows

ClBr3 is T shaped structure and hence it is non polar

In general smaller atoms have lower electronegativity values because of smaller structures they hold negative charges better.

In an isoelectronic series, the most positively charged ion has the smallest radius because as they loose more and more electrons their radius shrink due to high positive charge density